Flippanarchy

you can surely appreciate that describing self-defined ‘anarchist’ achievements as ‘communist’, while they faced counter-revolutionary action from ML-Communists, in a thread about the differences between Anarchism and Communism, is at best muddying the waters

I disagree, I think it's useful to detangle the term communism from the authoritarian dictatorships that called themselves communist (if anything, I think the compass in the OP is itself muddying the waters), in the same way that it is useful to detangle the term socialism from the Nazis which called their party socialist despite not being that at all (though that connotation is far less strong in the public consciousness compared to Communism and ML/Maoism)

However, Yliaster specifically asked if communism requires a state, as they likely had that common conception of communism being linked to authoritarian states. I do not think it would be helpful to further entrench that conception by saying "Yes, communism does require a state. Anarchism is a different thing." When that is not true.

I understand the usefulness of referring to stateless communism as socialism to avoid the connotation with ML's, especially among certain company who may shut down at the word communism (I sometimes even refer to Anarchism as Libertarian Socialism, depending on the crowd I'm talking to), but in the case of my response to Yliaster, it would not have made sense or brought any extra clarity to use those other terms, though I will admit I should've clarified that Anarcho-communism is a thing (but the video I linked to in my first comment clearly explains it was the Anarchists that achieved a socialist society in Spain, and explains how the stalinists betrayed them)